[metrics] Extend GpuMemoryBufferVideoFramePool UMAs

Change expiration date of histograms:
Media.GpuMemoryBufferVideoFramePool.UnsupportedFormat

Change-Id: I0d0a4129f68e16ff8d2420e3b788696b1ea0128f
Bug: 1053014
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2611247Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Miguel Casas <mcasas@chromium.org>
Commit-Queue: Lucas Berthou <berlu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841621}

tools/metrics/histograms/histograms_xml/media/histograms.xml

@@ -1996,7 +1996,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Media.GpuMemoryBufferVideoFramePool.UnsupportedFormat"
-    enum="VideoPixelFormatUnion" expires_after="M82">
+    enum="VideoPixelFormatUnion" expires_after="2022-01-06">
   <owner>dcastagna@chromium.org</owner>
   <owner>mcasas@chromium.org</owner>
   <summary>